Bulldozing or snowplow blade

Abstract

A clearing blade, as an attachment for a garden tractor or the like, is constructed as a double-walled construction thereby forming a box-like spreading funnel (5) between the wall members so that simultaneously with or after clearing snow, salt or other granular material may be spread by the same implement used for the clearing. Due to the rigid box-structure of the blade a sufficient strength is obtained even by materials of lesser strength than expensive, fracture resistant steels. Hence, such materials of lesser strength, e.g., synthetic materials, may be used for manufacturing the present blade by an injection molding or die-casting method.

What is claimed is: 
     
       1. A snow clearing blade construction as an attachment for a motorized device, comprising a snow clearing blade member (1) having a given horizontal blade length, a blade reinforcing wall member (2) having a horizontal wall length corresponding substantially to said given blade length, means including side walls operatively connecting said reinforcing member to the rear of said snow clearing blade member with a spacing between said clearing blade member and said reinforcing wall member, said snow clearing blade member and said wall member forming a double-walled upwardly open container corresponding in length substantially to said given horizontal blade length for increasing the rigidity in an area of power application to said clearing blade construction, a bottom wall closing said double-walled container downwardly, holes in said bottom wall for using said double-walled container as a spreader for granular material, a closure member (6) arranged for cooperation with said bottom wall for temporarily closing said holes in said bottom wall, and wherein said double-walled container is an injection molded one-piece integral structural unit forming a spreading funnel into which said granular material can be filled from the top for spreading downwardly directly behind said snow clearing blade member, substantially over its entire horizontal blade length. 
     
     
       2. The clearing blade of claim 1, further comprising strengthening ribs (4) reaching from a top edge of the clearing blade member to said blade reinforcing wall member. 
     
     
       3. The clearing blade of claim 1, wherein said double walled container is made of a cold temperature resistant synthetic material. 
     
     
       4. The clearing blade of claim 1, further comprising means for holding ballast weights. 
     
     
       5. The clearing blade of claim 1, wherein said closure member (6) for said bottom wall comprises a slide member with holes therein which register with said holes in said bottom wall when said slide member is in its granular material spreading position, said slide member closing said holes in said bottom wall when the slide member is in a hole closing position. 
     
     
       6. The clearing blade of claim 1, further comprising segment shaped attachment means (17) rigidly secured to said double-walled container on its side facing the motorized device, said attachment means having a circular arc-shaped edge (18) comprising equally spaced, equally dimensioned holes (13, 14) for receiving attachment bolt means (19) of a motorized device (9), said attachment means (17) further comprising a chord section rigidly attached to the double-walled construction. 
     
     
       7. The clearing blade of claim 6, wherein said arc-shaped edge of said attachment means (17) comprises four holes for receiving bolt means for attaching the blade to a motorized device (9); one hole being located at each of the locations left of center, right of center, left outside, and right outside. 
     
     
       8. The clearing blade of claim 6, wherein said segment shaped attachment means comprise two substantially semi-circular plates extending in parallel to each other at a predetermined spacing adapted to receive a hitching member of said motorized device, said holes extending in vertical alignment through both plates, so that the holes forming a pair are vertically aligned with each other. 
     
     
       9. The clearing blade of claim 1, further comprising skid shoe means (20) attached to the bottom edge of said clearing blade construction, and plug-in connection means operatively securing said skid shoe means to said clearing blade construction. 
     
     
       10. The clearing blade of claim 9, wherein said plug-in connection means are self-locking for preventing unintended removal of said skid shoe means. 
     
     
       11. The clearing blade of claim 9, wherein said skid shoe means are made of wear resistant and cold resistant synthetic material.